JP3220474U - Mounting jig for backing metal - Google Patents

Abstract

Provided is a backing jig mounting jig which can be temporarily fixed extremely easily when the backing metal is stacked and fixed inside the tapered surface of the end portion of the square pipe.
A main body 1 having a pair of arms 2 and having a substantially U-shape is formed. A fastening screw body 3 is provided at the tip of one arm portion 2. A support base 2 </ b> A is formed at the tip of the other arm 2. The tip position of the screw portion 3A is installed at a position where the inner side is tightened from the position of the support base 2A. The position of the support base 2A is set at a position where it comes into contact with the inner side surface behind the tapered surface P1. The thickness of the support base 2A is formed to match the thickness of the backing metal T. A main body 1 that matches various thicknesses of the backing metal T is selected and used.
[Selection] Figure 2

Description

  The present invention relates to a backing jig mounting jig used when temporarily fastening a backing metal to a column or the like of a steel structure.

  At the construction site, a square pipe called a column used for a column member of a steel structure is used. When constructing a column with this column, there is a case where the column and the column are welded, or a connecting member also made of a square pipe material is used as a joint for the beam, and the column is welded via this connecting member. .

  In the square pipe used as a column, a tapered surface is formed on the entire outer periphery of the opening end. For example, when welding the upper and lower columns, first, a backing plate of the strip steel plate is assembled in a ring shape inside the lower end of the upper column, and temporarily fixed so that the backing plate protrudes slightly from the lower end. Temporarily weld in the state. Then, the upper column is placed on the upper end portion of the lower column, and the end portion of the column and the backing metal portion are welded to fix the upper and lower columns.

  On the other hand, when a column is welded via a square pipe-like connecting member, a diaphragm is welded to the upper and lower ends of the connecting member in advance. In order to weld this diaphragm to the connecting member, as with the column-to-column welding, after temporarily fixing the backing metal to the upper and lower ends of the connecting member's square pipe, Weld the diaphragm.

  Thus, the backing metal assembled inside the square pipe used as the column or the connecting member needs to protrude slightly from the end of the square pipe. For this reason, Patent Document 1 discloses a welding backing jig that can accurately set the length of the backing metal protruding.

  According to this jig, a projection is provided on the outer peripheral surface of the backing metal, and the projection comes into contact with the opening end of the square pipe, thereby making the length of projection of the backing metal accurate.

  However, the jig described in Patent Document 1 is a jig that cannot accurately fix the disposed backing metal inside the square pipe even though the protruding length of the backing metal can be made accurate.

  Therefore, as a conventional means for temporarily fixing the backing metal to the inside of the square pipe, a tool such as a giant clam vise is used.

Japanese Patent Laid-Open No. 61-135477

  However, an extremely large amount of work was required to temporarily fix the backing metal inside the square pipe using the giant clam vise. That is, as shown in FIG. 3, when the backing metal T is temporarily fixed using the giant clam vise 10, the tip of the screw portion 11 and the support portion 12 that supports the backing metal T are aligned. Therefore, there is a problem that the tip of the screw portion 11 comes into contact with the tapered surface P1 formed over the entire circumference.

  As a result, the work of temporarily fixing the backing metal using a tool such as a clam vise is a work that is devised in each factory in order to solve such problems, and the backing metal In fact, it takes a great deal of time and effort to temporarily fix.

  Therefore, the present invention has been devised to solve the above-mentioned problems, and it is extremely easy work when temporarily attaching the backing metal to the inside of the tapered surface formed on the outer surface of the end of the square pipe. The purpose of the present invention is to provide a mounting jig for backing metal that can be temporarily fixed with a.

In order to achieve the above-mentioned object, the first means in the present invention is provided at the main body 1 having a pair of opposing arm portions 2 and having a substantially U-shape, and at the tip of one arm portion 2 of the main body 1. A tightening screw body 3 having a screw portion 3A for tightening in the direction of the other arm portion 2, and a support base 2A having a thickness protruding inward from the tip of the other arm portion 2 of the main body 1;
A backing jig mounting jig for temporarily fixing a backing metal T on the inner side of the tapered surface P1 of the square pipe P used as a column,
The position of the tightening screw body 3 of one arm portion 2 is set so as to abut on the position of the back of the arm portion 2 from the position of the support base 2A at the tip of the other arm portion 2 facing.
The position of the support base 2A of the other arm portion 2 is set at a position where it abuts on the inner side surface of the square pipe P which is deeper than the position of the tapered surface P1 of the square pipe P inserted into the main body 1,
The thickness of the support base 2A and the thickness of the backing metal T are configured to match,
The main body 1 having the support base 2A adapted to the backing metal T having different thicknesses is used.

  The tightening screw body 3 of the second means is composed of the screw portion 3A screwed to the distal end portion of one of the arm portions 2 and a rod-like handle portion 3B extended from the screw portion 3A. The handle portion 3B is formed so as to be curved in the direction opposite to the screw portion 3A.

  The screw portion 3A of the third means has a screw thread in which the screw pitch is twice that of the standard bolt.

  As in claim 1, the position of the tightening screw body 3 of one arm portion 2 is set so as to come into contact with the position behind the arm portion 2 from the position of the support base 2A at the tip of the other arm portion 2 facing. The position of the support base 2A of the other arm 2 is set at a position where it abuts on the inner side surface of the square pipe P which is deeper than the position of the tapered surface P1 of the square pipe P inserted into the main body 1. The thickness of the backing metal T and the thickness of the backing metal T coincide with each other. I can stop it.

  In addition, by using the main body 1 having the support base 2A adapted to the backing metal T having different thicknesses, there is no need for any adjustment work according to the member as in the conventional vise, and various thicknesses Very reasonable work can be done according to the money T.

  The tightening screw body 3 according to the second aspect has a handle portion 3B having a shape that is easy to hold and rotate because the handle portion 3B is curved in a curved direction toward the opposite direction of the screw portion 3A.

  As described in claim 3, since the screw portion 3A has a screw thread in which the screw pitch is twice that of the standard bolt, the screw portion 3A can be fastened at half the number of rotations, and the fastening speed of the screw portion 3A is increased.

  As described above, according to the present invention, the original purpose that the backing metal disposed inside the tapered surface of the square pipe used as the column can be temporarily fixed can be achieved.

It is a perspective view which shows the usage-like body of this invention. It is a side view which shows the usage-like body of this invention. It is a side view which shows the conventional usage-like body.

  Embodiments of the present invention will be described below. The present invention is an attachment jig for temporarily fixing a backing metal T by overlapping a taper surface P1 of a square pipe P used as a column.

  The configuration of the present invention is provided with a substantially U-shaped main body 1 and a tightening screw body 3, and has a vise shape as a whole (see FIG. 1).

  The main body 1 is a member provided with a pair of opposing arm portions 2, a fastening screw body 3 is provided at the distal end portion of one arm portion 2, and a support base 2 </ b> A is provided at the distal end of the other arm portion 2 ( (See FIG. 2).

  The support 2A has a thickness protruding in the inner direction of the main body 1, that is, in the direction of the square pipe P inserted into the main body 1, and is formed to have the same thickness as the backing metal T (see FIG. 2). ). Furthermore, the position of this support base 2A is installed at a position where it comes into contact with the inner side surface behind the tapered surface P1 of the square pipe P.

  On the other hand, the tightening screw body 3 is a member provided at the tip of one arm portion 2 and having a screw portion 3A for tightening in the direction of the other arm portion 2 (see FIG. 2). The tip of the screw portion 3A is installed at a position where the tip of the other arm portion 2 is opposed to the position behind the arm portion 2 from the position of the support base 2A.

  In the illustrated example, the screw part 3A and the handle part 3B constitute the tightening screw body 3 (see FIG. 1). The screw portion 3A is screwed to a female screw portion 2B formed at the distal end portion of one arm portion 2 (see FIG. 2). In particular, the screw portion 3A increases the rotational operation speed of the tightening screw body 3 by setting the screw pitch to twice that of the standard bolt.

  The handle portion 3B is a bar-like portion extended from the screw portion 3A, and the handle portion 3B is formed to bend in a curved shape toward the opposite direction of the screw portion 3A. According to such a handle portion 3B, it becomes easy to become familiar with the hand operating the tightening screw body 3, and the rotation operation can be facilitated.

  Then, a plurality of types of main bodies 1 having support bases 2A adapted to various thicknesses of the backing metal T are formed, and the main body 1 corresponding to the thickness of the backing metal T to be used is selectively used. That is, it is possible to always make a reasonable temporary stop by simply preparing the main body 1 that matches the thickness of the backing metal T used in the factory or work site.

  In addition, the structure of this invention is not limited to the example of illustration, The structure of the main body 1, the arm part 2, the fastening screw body 3, etc. is a design change and a shape in the range which does not change the main point of this invention, The installation position can be arbitrarily set.

P Square pipe P1 Tapered surface T Backing metal 1 Body 2 Arm 2A Support base 2B Female thread 3 Tightening screw body 3A Screw 3B Handle 10 Shaft vise 11 Screw 12 Support

Claims (3)

A main body having a substantially U-shape with a pair of opposing arm portions, a tightening screw body having a screw portion provided at the tip of one arm portion of the main body and tightening in the direction of the other arm portion, and the other of the main body A mounting for backing metal that has a support base with a thickness that protrudes inward from the tip of the arm of the arm, and temporarily secures the backing by overlapping the inside of the tapered surface of the square pipe used as the column A jig,
The position of the tightening screw body of one arm is set so as to contact the position of the back of the arm from the position of the support base at the other arm tip,
The position of the support base of the other arm part is installed at a position that comes into contact with the inner side surface of the square pipe at the back rather than the position of the tapered surface of the square pipe inserted into the main body,
It is configured so that the thickness of the support base matches the thickness of the backing metal,
A mounting jig for backing metal, characterized by using a main body having a support base adapted to backing metal of different thickness.   The tightening screw body includes the screw portion screwed to the tip of one of the arm portions and a rod-like handle portion extended from the screw portion, and the handle portion is opposite to the screw portion. The backing metal mounting jig according to claim 1, wherein the mounting jig is bent so as to bend toward the direction.   3. The backing metal mounting jig according to claim 1 or 2, wherein the threaded portion has a thread having a thread pitch twice that of a standard bolt.

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